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Same old problem?


jackb

New Member
Joined
Jul 5, 2016
Messages
8
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0
Points
1
Location
North Haven, Connecticut
Vehicle Year
1989
Make / Model
ford
Engine Size
2.9
Transmission
Automatic
My credo
Persist, kiss(keep it simple stupid)
Ron very helpful 2 yrs ago with my 89 2.9 4x4. 2 months it stumbled and codes said tps, again!The miles in 2 yrs less than 5k. Replaced tps and it ran great, redid suspension and exhaust, wonderful...until the other day when it died....again less than 400miles in last 2 months. The only way to start and get it back was to disconnect tps. Now I haven’t checked codes yet but just can’t believe the tps would be faulty again, that would be 3 in under 6k. Cel. Came on before it stopped and it has new distributor, computer, coil, relays good and fuel pressure correct. Suspect MPs but don’t know how to check. Please help wife says it’s gotta go takes too much time but can’t afford another and I NEED a truck.
 


RonD

Official TRS AI
TRS Technical Advisor
Joined
Jun 2, 2012
Messages
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Location
canada
Vehicle Year
1994
Make / Model
Ford
Transmission
Manual
Check the TPS voltage

Use a sewing needle and voltage meter set to 20volts DC
Ground the Meter's black probe
Use sewing needle to pierce the top wire on the TPS
Turn on the key
Top wire should read 5volts, 4.8-5.2 is OK

Pull out needle and pierce Middle TPS wire
test voltage, should be under 1volt, .69-.99v

If it is 4.5volts, or higher, then TPS is bad, and computer will turn off Fuel injectors so No Start.
The top and middle wires could be shorted together in the harness, so TPS is not the problem, so unplug the TPS connector and test the wires, if middle wire still shows 4.5v or higher then you will need to find that short
 
dirtymike

dirtymike

Active Member
U.S. Military - Veteran
Joined
Dec 30, 2010
Messages
527
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112
Points
43
Age
62
Location
knoxville TN
Vehicle Year
1987
Make / Model
Ranger lwb
Engine Type
2.9 V6
Transmission
Manual
2WD / 4WD
4WD
Total Lift
1 inch spacers
Tire Size
P23575R15
My credo
Do unto others then Split-probasti me et chognuisti me
This is some good info. Anybody her that can sticky note this
 
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